Finding the Fourth Proportional to 142,800.96, 197,060.32 and 79,144.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,800.96 : 197,060.32 = 79,144.72 : x
2. Step 2: Convert to fraction form
   142,800.96/197,060.32 = 79,144.72/x
3. Step 3: Cross multiply
   142,800.96x = 197,060.32 × 79,144.72
4. Step 4: Simplify right side
   142,800.96x = 15,596,283,849.51
5. Step 5: Solve for x
   x = 15,596,283,849.51/142,800.96
6. Step 6: Final answer
   x = 109,216.94